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Proof step 4 from proof band-63-pos (previous step)

¬(0 ≤ i ∧ ¬ false ∈ int2bits(63).rest ∧ 0 ≤ 63), i < 64, 0 ≤ i ⊦ band(i, 63) = i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
i < 64, 0 ≤ i, false ∈ int2bits(63).rest ⊦ band(i, 63) = i

Rule argument

Additional information

Used simplifier rules: ⊦ i ≤ j → (¬ ¬ j < i ↔ false);% ⊦ ¬ i ≤ j ↔ j < i;